A soft-pack lithium battery heat dissipation structure

Abstract

The utility model relates to the field of battery technology, and in particular to a heat dissipation structure of a soft-pack lithium battery, comprising a battery body, the outer edge of the battery body is connected to a shell, the shell is wrapped around the battery body, and an expansion absorption component is provided facing the battery body, the expansion absorption component is provided with at least two groups, the two expansion absorption components are arranged oppositely, and the expansion absorption component is provided with a heat dissipation component facing the battery body. The utility model aims to quickly and stably dissipate heat for the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat dissipation structure of a soft-pack lithium battery. Background Art

[0002] Soft-pack lithium batteries are liquid lithium-ion batteries covered with a polymer shell, and are generally packaged in aluminum-plastic film. This type of battery has excellent safety performance. Even if there are safety hazards, only bulging and cracking will occur on the outer wall of the soft-pack lithium battery. The inside of the soft-pack lithium battery is liquid electrolyte, and the outside of the battery is soft. In addition to good safety performance, it is light in weight, large in capacity, small in internal resistance, and flexible in design. Therefore, it has been widely used in the digital and electronic fields.

[0003] In the related art, soft-pack lithium-ion batteries are packaged in a shell, and avoidance grooves are provided on the front and back sides of the shell relative to the soft-pack lithium batteries. The avoidance grooves penetrate the shell and are connected to the side walls of the shell. Heat dissipation holes are arranged in an array on the side walls, and a fan is provided on the side walls facing the avoidance grooves. The fan drives wind through the heat dissipation holes and the avoidance grooves to remove the heat of the battery. However, the soft-pack lithium battery itself is prone to swelling. Although this shell can dissipate heat for the battery well, the avoidance grooves arranged in an array are prone to damage the battery surface when the battery swells. Utility Model Content

[0004] The main purpose of the utility model is to provide a soft-pack lithium battery heat dissipation structure, which is intended to quickly and stably dissipate heat for the battery.

[0005] To achieve the above-mentioned purpose, the utility model proposes a soft-pack lithium battery heat dissipation structure, including a battery body, the outer edge of the battery body is connected to a shell, the shell is wrapped around the battery body, and an expansion absorption component is provided facing the battery body, the expansion absorption component is provided with at least two groups, the two expansion absorption components are arranged opposite to each other, and the expansion absorption component is provided with a heat dissipation component facing the battery body.

[0006] In one embodiment of the present application, the heat dissipation assembly includes an air inlet channel, a heat dissipation fan and an air outlet channel:

[0007] The air inlet channel is arranged through one end of the expansion absorbing assembly away from the battery body;

[0008] The heat dissipation fan is connected to the air inlet channel and is arranged facing the battery body; and

[0009] The air outlet channel is arranged between the expansion absorption component and the battery body, and the air outlet channel is arranged at one end of the heat dissipation fan away from the air inlet channel.

[0010] In one embodiment of the present application, an air path is provided between the air inlet channel and the air outlet channel, the heat dissipation fan is connected to the air path, and the diameter of the air path is set to change from narrow to wide from the air inlet channel to the air outlet channel.

[0011] In one embodiment of the present application, the expansion absorption component is provided with an adjustable airbag facing the battery body, and the adjustable airbag is provided in multiple groups, and the multiple groups of adjustable airbags are evenly spaced and wrapped around the heat dissipation fan.

[0012] In one embodiment of the present application, the expansion absorption component is provided with a mounting groove relative to the adjustable airbag, the bottom surface of the mounting groove is connected to the air inlet channel, the mounting groove is provided with an open end away from the air inlet channel, and the open end is wrapped around the adjustable airbag.

[0013] In one embodiment of the present application, a heat conducting plate is provided at the bottom end of the mounting groove, one end of the heat conducting plate is connected to the adjustable airbag, and the other end is connected to the air inlet channel, and a heat conducting adhesive layer is filled between the mounting groove, the heat conducting plate and the adjustable airbag, and the heat conducting adhesive layer is wrapped around one end of the adjustable airbag away from the open end.

[0014] In one embodiment of the present application, the shell is provided with mounting springs facing the battery body and the expansion absorbing assembly, and the mounting springs are provided in multiple groups, and the multiple groups of mounting springs are wrapped around the battery body and the expansion absorbing assembly.

[0015] The technical solution of the utility model adopts a shell for covering the outer wall of the battery body for protection. In order to prevent the battery body from being damaged when it expands slightly, the shell is provided with an expansion absorption component facing the battery body. The structure of the expansion absorption component can be a mounting block. The mounting block is provided with a water pad facing the battery body. The water pad is formed by wrapping the water body with a protective adhesive layer. The battery body is clamped by the water pad. The water pad has good toughness and can absorb the pressure caused by the expansion of the battery body when the battery expands slightly. The expansion absorption component is provided with a heat dissipation component facing the battery body. The heat dissipation component is a water circulation system. A water inlet and a water outlet are provided on the side edge of the mounting block. The water inlet and the water outlet are both connected to the water pad. The battery body can be cooled by the water pad. When the battery expands, the water volume can be adjusted in the background to reduce the pressure between the battery body and the water pad, which is conducive to better protection of the soft-pack lithium battery body. The above structure can quickly and stably dissipate heat for the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the heat dissipation structure of a soft-pack lithium battery of the utility model;

[0018] Figure 2 It is a cross-sectional view of an embodiment of the heat dissipation structure of a soft-pack lithium battery of the utility model;

[0019] Figure 3 This is a schematic diagram of the expansion absorption component structure of an embodiment of the soft-pack lithium battery heat dissipation structure of the utility model.

[0020] Description of Figure Numbers:

[0021] 1. Battery body; 2. Shell; 3. Expansion absorption component; 31. Mounting slot; 32. Open end; 33. Heat conduction plate; 34. Heat conduction adhesive layer; 4. Adjustable airbag; 5. Heat dissipation component; 51. Air inlet channel; 52. Heat dissipation fan; 53. Air outlet channel; 54. Air path; 6. Install the spring clip.

[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] Reference Figures 1 to 3 In one embodiment of the utility model, a soft-pack lithium battery heat dissipation structure is proposed, including a battery body 1, the outer edge of the battery body 1 is connected to a shell 2, the shell 2 is wrapped around the battery body 1, and an expansion absorption component 3 is provided facing the battery body 1, and at least two groups of expansion absorption components 3 are provided, and the two expansion absorption components 3 are arranged opposite to each other, and the expansion absorption component 3 is provided with a heat dissipation component 5 facing the battery body 1.

[0025] In a soft-pack lithium battery heat dissipation structure of the present application, the outer wall of the battery body 1 is covered with a protective shell 2. In order to prevent the battery body 1 from being damaged when it expands slightly, the shell 2 is provided with an expansion absorption component 3 facing the battery body 1. The structure of the expansion absorption component 3 can be a mounting block. The mounting block is provided with a water pad facing the battery body 1. The water pad is formed by wrapping the water body with a protective adhesive layer. The battery body 1 is clamped by the water pad. The water pad has good toughness and can absorb the pressure caused by the expansion of the battery body 1 when the battery expands slightly. The expansion absorption component 3 is provided with a heat dissipation component 5 facing the battery body 1. The heat dissipation component 5 is a water circulation system. By arranging a water inlet and a water outlet on the side edge of the mounting block, the water inlet and the water outlet are both connected to the water pad. The battery body 1 can be cooled by the water pad. When the battery expands, the water volume can be adjusted in the background to reduce the pressure between the battery body 1 and the water pad, which is conducive to better protection of the soft-pack lithium battery body 1. The above structure can quickly and stably dissipate heat for the battery.

[0026] Combined with reference Figures 2 to 3 In one embodiment of the present application, the heat dissipation component 5 includes an air inlet channel 51, a heat dissipation fan 52 and an air outlet channel 53. The air inlet channel 51 runs through the end of the expansion absorption component 3 away from the battery body 1; the heat dissipation fan 52 is connected to the air inlet channel 51 and is arranged facing the battery body 1; the air outlet channel 53 is arranged between the expansion absorption component 3 and the battery body 1, and the air outlet channel 53 is arranged at the end of the heat dissipation fan 52 away from the air inlet channel 51.

[0027] In a soft-pack lithium battery heat dissipation structure of the present application, the heat dissipation component 5 includes an air inlet channel 51, a heat dissipation fan 52 and an air outlet channel 53. In the present embodiment, the battery body 1 is cooled through the air path 54. The air inlet channel 51 passes through the end of the expansion absorption component 3 away from the battery body 1. It can pass through the expansion absorption component 3 horizontally from left to right or from top to bottom, and does not affect the function of the air inlet channel 51. The air outlet channel 53 is arranged at the end of the heat dissipation fan 52 away from the air inlet channel 51, and is formed by the gap generated after the expansion absorption component 3 supports the battery body 1. The heat dissipation fan 52 is arranged at the end of the expansion absorption component 3 facing the battery body 1. The heat dissipation fan 52 continuously blows air for the battery body 1 to dissipate heat, so that negative pressure is generated in the air inlet channel 51, and then the air inlet channel 51 draws air to the outside. Through these structures, the flow of wind can be accelerated and the heat dissipation efficiency can be improved.

[0028] Combined with reference Figures 1 to 3 In one embodiment of the present application, an air path 54 is provided between the air inlet channel 51 and the air outlet channel 53, the heat dissipation fan 52 is connected to the air path 54, and the diameter of the air path 54 is set in a shape that changes from narrow to wide from the air inlet channel 51 to the air outlet channel 53.

[0029] In a soft-pack lithium battery heat dissipation structure of the present application, an air path 54 is provided between the air inlet channel 51 and the air outlet channel 53. The diameter of the air path 54 gradually increases in the direction close to the battery body 1 to form a trumpet-shaped structure. The air path 54 can be divided into two parts: a mounting part and a diffusion part. The mounting part is used to install the fan and is a cylinder. The negative pressure effect can be improved through a small diameter, thereby improving the air suction efficiency of the air inlet channel 51. The diffusion part is connected to the mounting part to increase the wind flow rate and accelerate heat dissipation.

[0030] Combined with reference Figure 3 In one embodiment of the present application, the expansion absorption component 3 is provided with an adjustable airbag 4 facing the battery body 1 , and the adjustable airbag 4 is provided with multiple groups, and the multiple groups of adjustable airbags 4 are evenly spaced and surrounded by the heat dissipation fan 52 .

[0031] In a soft-pack lithium battery heat dissipation structure of the present application, an expansion absorption component 3 is provided with an adjustable airbag 4 facing the battery body 1. In the present embodiment, the expansion absorption component 3 absorbs the expansion pressure of the battery body 1 through the airbag. The adjustable airbags 4 are evenly spaced and surround the heat dissipation fan 52 therein, so that the heat dissipation fan 52 can dissipate heat for the adjusting airbag while dissipating heat for the battery body 1, thereby avoiding damage to the adjusting airbag due to excessive heat absorption. The pressure between the shell 2 and the battery body 1 is adjusted by the adjusting airbag, so as to clamp the battery body 1 and play a buffering role at the same time. Even if the adjusting airbag is damaged, it only needs to be replaced, and there is no need for water overflow to damage the battery body 1 after the water pad is damaged.

[0032] Combined with reference Figures 2 to 3 In one embodiment of the present application, the expansion absorption component 3 is provided with a mounting groove 31 relative to the adjustable airbag 4, the bottom surface of the mounting groove 31 is connected to the air inlet channel 51, and the mounting groove 31 is provided with an open end 32 away from the air inlet channel 51, and the open end 32 is wrapped around the adjustable airbag 4.

[0033] In a soft-pack lithium battery heat dissipation structure of the present application, an expansion absorption component 3 is provided with a mounting groove 31 relative to the adjustable airbag 4, and the bottom of the mounting groove 31 is connected to the air inlet channel 51, so that the air inlet channel 51 can first cool the adjustable airbag 4, and the mounting groove 31 is provided with an open end 32 away from the air inlet channel 51, and the periphery of the adjustable airbag 4 is covered inside by the open end 32, which can prevent the airbag from abutting against the open end 32 and causing damage when it is deformed.

[0034] Combined with reference Figures 2 to 3 In one embodiment of the present application, a heat conducting plate 33 is provided at the bottom end of the mounting groove 31, one end of the heat conducting plate 33 is connected to the adjustable airbag 4, and the other end is connected to the air inlet channel 51, and a heat conducting adhesive layer 34 is filled between the mounting groove 31, the heat conducting plate 33, and the adjustable airbag 4, and the heat conducting adhesive layer 34 is wrapped around the end of the adjustable airbag 4 away from the open end 32.

[0035] In a soft-pack lithium battery heat dissipation structure of the present application, a heat conducting plate 33 is provided at the bottom end of the mounting groove 31, which can accelerate the heat exchange between the adjustable airbag 4 and the air inlet channel 51 to achieve the effect of rapid cooling. The gap between the adjustable airbag 4, the heat conducting plate 33 and the mounting groove 31 is filled with a heat conducting adhesive layer 34, which can enhance the heat exchange and prevent the airbag from being damaged when the airbag is deformed.

[0036] Combined with reference Figures 1 to 3 In one embodiment of the present application, the shell 2 is provided with mounting springs 6 facing the battery body 1 and the expansion absorbing assembly 3 , and the mounting springs 6 are provided in multiple groups, and the multiple groups of mounting springs 6 are wrapped around the battery body 1 and the expansion absorbing assembly 3 .

[0037] In a soft-pack lithium battery heat dissipation structure of the present application, the shell 2 also includes an installation spring 6, which is the frame structure of the entire shell 2. In this embodiment, the installation spring 6 is arranged at the four corners of the battery body 1. While limiting the battery body 1 and the expansion absorption component 3, it can effectively protect the battery body 1 when the battery body 1 expands slightly to avoid damage. The above structure can effectively improve the heat dissipation efficiency of the battery body 1.

[0038] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A soft-pack lithium battery heat dissipation structure, comprising a battery body, characterized in that: The outer edge of the battery body is connected to a shell, the shell is wrapped around the battery body, and an expansion absorption component is provided facing the battery body. The expansion absorption component is provided with at least two groups, and the two expansion absorption components are arranged opposite to each other. The expansion absorption component is provided with a heat dissipation component facing the battery body.

2. A soft-pack lithium battery heat dissipation structure according to claim 1, characterized in that: The heat dissipation component comprises: An air inlet channel, the air inlet channel being arranged through an end of the expansion absorbing assembly away from the battery body; a heat dissipation fan, the heat dissipation fan being connected to the air inlet channel and arranged facing the battery body; and An air outlet channel is provided between the expansion absorption assembly and the battery body, and the air outlet channel is provided at one end of the heat dissipation fan away from the air inlet channel.

3. A soft-pack lithium battery heat dissipation structure according to claim 2, characterized in that: An air path is provided between the air inlet channel and the air outlet channel, the heat dissipation fan is connected to the air path, and the diameter of the air path is configured to change from narrow to wide in the direction from the air inlet channel to the air outlet channel.

4. A soft-pack lithium battery heat dissipation structure according to claim 2, characterized in that: The expansion absorption component is provided with an adjustable airbag facing the battery body, and the adjustable airbag is provided with multiple groups. The multiple groups of adjustable airbags are evenly spaced and wrapped around the heat dissipation fan.

5. A soft-pack lithium battery heat dissipation structure according to claim 4, characterized in that: The expansion absorption component is provided with a mounting groove relative to the adjustable airbag, the bottom surface of the mounting groove is connected to the air inlet channel, the mounting groove is provided with an open end away from the air inlet channel, and the open end surrounds the adjustable airbag.

6. A soft-pack lithium battery heat dissipation structure according to claim 5, characterized in that: A heat conducting plate is provided at the bottom end of the mounting groove, one end of the heat conducting plate is connected to the adjustable airbag, and the other end is connected to the air inlet channel. A heat conducting adhesive layer is filled between the mounting groove, the heat conducting plate and the adjustable airbag, and the heat conducting adhesive layer is wrapped around one end of the adjustable airbag away from the open end.

7. The heat dissipation structure of a soft-pack lithium battery according to claim 1, characterized in that: The shell is provided with mounting springs facing the battery body and the expansion absorption component. The mounting springs are provided in multiple groups, and the multiple groups of mounting springs are wrapped around the battery body and the expansion absorption component.

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